'obstack.h' file not found when build using android NDK
Steps:

mkdir build; cd build
cmake .. \
  -DANDROID_ABI=arm64-v8a \
  -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake \
  -DANDROID_PLATFORM=31 \
  -DCMAKE_BUILD_TYPE=Release \
  -DBOX32=ON \
  -DBUILD_TESTS=OFF

make -j4



Error happens:

.../box64/src/libtools/myalign32.c:9:10: fatal error: 'obstack.h' file not found
    9 | #include <obstack.h>